Acknowledgements
The authors thank Ivan Collu, Concetta de Simone and Andreea Voicu for their technical assistance.
Disclosure statement
The authors report no declarations of interest.
Funding
This work was supported by the ‘Associazione Sarda per la ricerca in Oncologia Ginecologica-ONLUS’ with funding from the ‘Banco di Sardegna’ Foundation [grant no. 5335, 2014].